<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title>组合选择器</title>
    <link href="css/css_04_组合选择器.css" rel="stylesheet">
</head>
<body>
<h1>一级标题</h1>
<p>段落标签</p>
<label>label标签</label><br>
<span class="s1">span标签</span><br>
<input type="text" placeholder="文本域3">
<p class="p1">
    <label class="str1">P1子元素</label>
    <span class="sp1">span元素1</span>
    <span>span元素2</span>
</p>

<ul class="d1">
    <li>第一个元素</li>
    <li>第二个元素</li>
    <li>第三个元素</li>
    <li>第四个元素</li>
    <li>第五个元素</li>
</ul>

<button class="btn1">每日特供</button>

</body>
</html>